Do you have any job skills that are now obsolete?

[electric_blue68]

368. I took a class at Art College to learn how a printing house worked...

We walked about 1/2 mile+ in good weather over to an area where a fair amount of printing presses were.

It was a high medium to low high end printer. We saw some 2 color jobs they did for the Metropol Myseum of Art.
Our teacher was the part, or total owner of the company. He was a great teacher!

We saw stripping, the plates, the 4 color process with the ?dot matrixes and more. We got to prepare art, maybe some added text for a 2 color print ourselves for homework that he printed out. We had prints of each color, then the combined one.

The "wildest" thing he taught us (back then ? '71, or '72) was that Kodakchrome was not a color film??!!!
How could that be?!

Well, it turned out it was actually a B&W dye transfer film!
Each layer registered one of the 4 process colors: cyan, magenta, yellow, or black. The corresponding layer was dipped in that color's dye, and the whole 4 layers sandwiched back together for a full color slide.
I don't exactly how that was done - it's not a thick layer of plastic, and yet it had to be separated so each layer got it's color dye, but there you go.